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Just completed this mod in my 2008 328xi but with the M3 DCT shift knob. Wanted to post a few notes to help out others...
1) M3 DCT knob part # 25122283705 (Switch, Throttle Valve)
2) The M3 knob has a 10 pin connector
3) Pin assignments for "blue" connector (from R -> L)
1 - +12v
2 - Night Illimunation +12V
3 - Ground
4 - EGS MGE
5 - N/A (not needed for mod)
6 - EGS MGA
4) Pin assignments for "white" connector (from L -> R)
1 - Not Used
2 - Park (not needed for mod)
3 - Reverse
4 - Neutral
5 - Drive (I connected to the D/S led on mine)
I don't have the pin assignments on the M3 knob since I removed the connector, but they are very easy to figure out with a 12 volt power source.
I used 2 of the Universal Pin Terminal Uncoded (Part # 61136913635) and 8 of the Pin Contacts (Part # 611300005198) in my install completely eliminating the Blue PRND indicator.
M3 Knob_____________Connector______Pin
+12V...............................Blue........... .....1
Illumination......................Blue............ ....2
Illum Ground....................Blue................3
R....................................White........ ......3
N....................................White........ ......4
D/S.................................White........... ...5
"+"..................................Blue......... ......4 & 6
"-"...................................Blue.......... .....4 & 6
M/S (center between +/-)...Blue...............4 & 6
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